Rotary oven



Jan. 24, 1933. 1 NEEDHAM I 1,895,230

ROTARY OVEN Filed Oct. 27. 1931 2 Sheets-Sheet 1 -VN N) i QQ J. NEEDHAM ROTARY OVEN Jan. 24, 1933.

Filed Oct. 27. 1931 2 Sheets-Sheet INVENTOR. Josew/ /dMw BY Patented Jan. 24, 1933 UNITED 4sivxrlis yPii-rla'ziri' OFFICE i JOSEPH NEEDHAM, or rAs'sAICQ'N'EW JRSEY ROTARY OVEN Application nica october 27, 1931. Vserial No. 571,347;

This invention relates to 'what are known as rotary baking ovens; and the ob]ect of the invention is to provide an oven of this class made up of a plurality of sections so constructed Vas to permit the quick assemblage of an oven in making an installation, and also facilitating vthe packing and shipping of the several parts ofthe oven; a further object being to provide an oven of the class 10 described involving a simple,`strong and dii-y rable frame structure with a plurality of wall sections readily assembled in connection with the frame structure in erecting the oven; a further object being to provide a rotarytable composed of a plurality of plate sections forming a light and yet'strongvanl durable table; a still further object being to provide means for adjustably supporting the table '-20 so as to properly aline the same with thev peel door Aof the oven; and with these and other objects in view, the invention consists in an apparatus of the class and for theV purpose" specified, which 4is simple in construction, efficient in use,` and which is 25 constructed as hereinafter described and broken away and in section; l line 3-3 of Fignl.-

claimed.

The invention is fullyidisclosed in the following specification, of which the accom panying drawings form a part, in which the separate parts of my improvement aredesignated by suitable reference characters in each of the views, and in which vFig. 1 is a transverse, sectional view 35 through an oven made according to my in? vention, the section being on the 'line 1-1 of Fig. 3. 4 Fig. 2 is a sectional `pla-I1 view ony the line 2-2 of Figrl with parts of the construction by the use of brick masonry, "steel and theV like, making the installation cost very high by .reason of the requirement of skilledlabor.` It is the principal feature of my invention to provide an oven of the class under consideration, the several parts of which are con# structed in their entirety in a plant or` fac= tory and shippediii sections or parts to the job'and quicklyV assembled without the re-` quirement of skilled labor or lossoi' time. y It willalso be apparent thatl by virtueof the construction of my improved oven, jthe saine may be quickly and leasily knocked down for shipment or removal whenever desired oi' necessary.

In the accompanying drawings, I have fl shown onel method of carrying my invention into eect; and in the structure shown, I employ fourupright frame members 10, 10a, 10b and V10c which constitute supporting legs in tliatthey extend below the `oven proper asm:

clearly seen inFig. 11 of the drawings. Thel frame members 10-10a arel joinedby atop cross. frame member 11 andthe frame mein.- bers '10bA andvlOc are joined by a bottom cross Vframe member 12. An angle iron ring13 coupledfwith the upper edges ofall ofythe vertical frames 104-100 at the top thereof, and 'a similar ringl/ljoints said ,frame adf jacent tliecross frame 12, the latter `forming a flange upon which the bottom wall `l5 of theloven is supported as well as being supported on lthe cross frame 12. The top VwallV l0 of the oven is arranged beneath thering 13 and is supported-in the cross frame 11,V

and around the periphery 'of the walls 15 jand 16 is the side wall 17 of the oven, lwhichin the construction shown, is of circular cross sectional'form. The Wallsrv 15, 16 and 17 arev all composed yof sectionalv parts, each .sec-,y

tional part consisting of aithin metallic shell` Within which is a body of insulating material such' for example as `Rockwoohthus forming a relatively light wall structure fortheentire. l

oven. The top and bottomwall sections will be in the form of quarter sections divided along the line of the cross frames *l1 ,and 12, and at `ninety degrees to the cross framesas will beV apparent on a consideration ofthe top section 16 as seen in ings.` Y. i. rtl,

The sidewall sections 17 are disposed berate sections of the top and bottom walls will tween adjacent walls of the sections 15 and 16 so that the outer surfaces 'of the sections 17 when assembled, are substantially in alinement with the peripheral walls of the sectionsv 15 and 16, and said sections 17 in the construction shown are made up in eighths so that eight of the sections are required to build the circumferential side wall of the ioven, a pair of'sections 17 being disposed between each vertical frame. At the adj acentcfaces of each pair of sections as at 17 a, avertial stripl .18 is mounted on the outer surface of said sections to form a reinforcing strip at the inter- 21 arrangedv on the inner surface of the sections 17. It is also preferred thatthe space between the adjacent surfaces of the sections 17 be illedin with an asbestos or'other suitable cement as'indicated at 22, note Fig. 4 of the drawings. It will also be understood that the adjacent ends of the sections 17 at the vertical frames 10, a, 10?) and 10c are coupled together by bolts 19a similar to the bolts 19, and the adjacent surfaces are sealed by the asbestos cement 22. It will also be understood that the-engaging surfaces betweenl the sections 17 and the top and bottom walls 16 and l of the oven will be cemented as indicated at 23, and adjacent surfaces'of the sepabefcementedtogether as indicated at 24.

Two of the side walljsections 17 lare cut out toform an opening 25 controlling admislsion to the upper chamber 26 of theoven,

"f inv which opening is arranged the usual peel `door 27. SThev opening k25 is lined by a suitable metallic facing 28 which will be preferably cemented in place; Passed through one of the side wall sections 17 are two gas burner tubes`-29 for heating the upper chamber' 26 ofthe oven, these tubes being arranged'adjacent the peel door V27. Another pairl Yof burner tubes 30 is passed through another section 17, preferably adjacent the opposite side of the peel door andl opening into the lower chamber 26a of the oven, said vchambers being subdivided by a supporting table 31and a beveled ring 32 attached tol the wall sections 17 and arranged adjacent the peripheralr edge 'of the table, as clearly seen in vFig. .lof the drawings. At 33 I have shown 'a flue discharge through which the products of combustion are adapted to pass. This discharge is arranged in the cross frame member V11, butmay be positioned and mounted in any desired manner. The table 31 is secured to a shaft 34 arranged centrally and verticallyfof the oven, the upper end of the shaft projecting through the top wall motor 40 and shaft 37 being mounted on a plate 41 secured to the cross member 11.

The lower en d lof the shaft 34 is supported in connection with the cross member 12 so that therweight of the table is primarily taken upby said cross frame, a box-shaped casing 42 being secured centrally of the cross frame 12 and extending therebelow, and -an adjustable screw 43 is mounted in connection with the casing and carries at 'its upper end a` thrust bearing 44, uponfwhich thelower end of the shaft 34 rests.` With this yconstructionthe shaft 34 including the table 31 attached thereto may bev adjusted vertically in the oven toloring the peripheral edge of the table in alinement with the bottom wall of the liner 2 8 for the opening 25 so as to facilitate the placement of pans upon the tableand the removal of the pans therefrom. It will also be `noted that the gear 35 is adjustably secured on the upper end ofthe shaft to compensate for the adjustment of the table 31 by means of a set screw 35a.

The table 31 in the construction shown, consists of twofhub` portions 45 and 46 secured to the'shaft and including intermediate coupling elementsl 47 whereby a plurality ofv table forming sections 31a may be coupled together and tothe hub portion consisting ofY the parts 45,v 46 and 47 by bolts `48. 'The coupling elements 47 include side vflanges to whichvthe sections31a are bolted or riveted as seenat49.v A Each section 431a consists of a top plate of such form as to make up one eighth of a complete circular plate, and including side walls, one of which has an outwardly projecting flange 31?) arranged adjacent the periphery of the table 31, land the other side wall having Aroo a similar flange 310 arranged adjacent the aXis of the table. It will therefore beapparent that the separate sections 31a are reinforced and interlocked at their adj acentjsurfaces, which adjacent surfaces are preferably cemented together to form a'smooth top surface. The outer ends of the side walls of each section 31 are cut out and bent to formV flanges 31Z`disposed inwardly of the periph'- eral edge of the sections, and to which an annular angle iron ring 50l is secured. 'Thisl ring reinforces theperipheral edges ofthe sections 31a'as Vwell as maintaining said secz tions in proper horizontal alinement'with respect to each other; It will be Vunderstood `that byv coupling the sections 31a to the couplings 47in ythe manner described,y the same may be readily 'assembled together and cou- Iinseriamo t pled with the hub portions l5 andl 46 by the bOlts 4:8. j f j From the foregoing,` it will be apparent that by virtue of1my improved ovenconstruction, the complete apparatus may be quickly assembled at the place where .the oven is to be erected, and when assembled, the oven will possess allof the desirable characteristics of apparatus of this class, suchfor example as the heat insulation walls, the rotary table, all olfA whichis of'light and yet strong and durable construction, andit will thusrbe seen that amaterialsaving in the cost of manufacturing the severalfparts of the apparatus as well asthe-cost of erecting the same will be effected. i

It will also be understood that while I have shown certain type andV arrangement of burners in connection with my improved oven, and one-methody of discharging the products of combustion therefrom, that I am not `necessarily limitedV in this respect, nor am I limited to the .direct or substantially directheating of the products placed on the table for baking, and various other changes in and modifications of the construction herein shown and described may be made within the scope of the appended claims without departing from the spirit of my invention or sacrificing its advantages.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. An oven of the class described comprising a frame consisting of a plurality of vertical frame members, two opposed frame members being coupled by one transverse top frame,l two other vertical frame members coupled by a lower cross frame arranged at right angles to the first named cross frame, a rotatable table including a shaft supported upon the bottom cross frame, and means for vertically adjusting said shaft and table with respect to said cross frame. j

2. An oven of the class described comprising a frame consisting of a plurality of vertical frame members, two opposed frame members being coupled by one transverse top frame, two other vertical frame members coupled by a lower cross frame arranged at right angles to the first named cross frame, a rotatable table including a shaft supported upon the bottom cross frame, means for vertically adjusting said shaft and table with respect to said cross frame, the upper end of said shaft projecting through the top cross frame, and means supported in connection with the top cross frame for rotating said shaft.

3. An oven of the class described comprising a frame consisting of a plurality of vertical frame members, two opposed frame members being coupled by one transverse top frame, two other vertical frame members coupled by a lower cross frame arranged at right angles to the first named cross frame,a rotatable table including a shaft supported upon the bottom cross frame, means for vertically adjusting said shaft and table with rej i spectto said cross frame, the upper end of said shaft projecting through the top cross frame, means supported in connection with the top vcross frame for rotating said shaft, said last named means comprising an electric motor and agear chain betweensaidshaft andthe shaft of the motor. l f K 4. Avrotary oven of the class described comprisinganoven body and-a frame for supporting said body, said frame consisting Vof a plurality of vertical frame members forming supporting legs for the oven, annular frame members coupling and spacing said vertical frame members and arranged at the upper andlower surfaces ofthe oven body mounted therein, and top and `bottom cross frame members engaging the upper and lower surfaces of the oven body, said oven body consisting of top, bottom` and side walls, and all of said walls beingwcom-l posed of independent, preformed sections, each section consisting ofl a comparatively thick wall containing heat resisting material.v

5.V A rotary oven of the class described. comprising'an oven body composed of top, bottom' and side walls, each constructedfrom a Vplurality of independent preformed sections, each sectionconsisting offspa'ced wall* plates Vwith a filler of heat resisting material,l a

frame for supportingthe oven body consisting ofvertical Vframe-members spaced about the periphery of the oven body and projecting therebelow to form supporting legs, an-v nular rings coupling said vertical frames together and arranged one atth'e top andthe other at the bottom of the oven body to position said `body in the frame and transverse frame members arranged one at the topand the other at the bottom of the oven body, a shaft `arranged centrally and vertically of the roven body and supported in saidtransverse frame members, a table secured tosaid shaft within the oven body, the shaft projecting at the top of theoven, and means involving-an electric ymotor supported in connection :with the topl cross frame member for rotating said shaft and table. 6. A rotary oven of the classdescribed comprising an oven body, the top, bottom and side walls of which are composed of inde- Y pendently formed sections anda frame for i supportingthe oven body consisting of aplurality of vertical frame bars lproj ecting below the oven'body to form supporting legs,.two

ist

annular rings for supporting and positioning the oven body at -the upper end v,of -thebars and top and bottom cross frame members arranged upon the top and bottom walls offthe oven body, an opening formedpin'the side wall of the oven body controlling'admission tothe chamber of said body,a table rotatably mounted in said chamber, said tablez including a shaft projectiiigithrough the upper and lower-Walls of theV oven body and-said cross members, and meansI supported in connection With `the bottom cross frame member for adjusting said shaft and table vertically in the chamber cf the oven to position the upper surface of the table With respect to the opening mounted therein .and top and bottonifcross frame members engaging theupper and lower surfacesiof theovcnbody, said oven body consisting o fltop, lbott-,om `rand side Walls, all

. of said Walls being composed of independent,

preformed sections, keach section consisting of a comparatively thick Wall containing heat resisting material, the .side Wall of theoven being composed of eight curved Wall sections having adjacent edges arranged in abutting relation and forming a cylindrical oven chamber therewithin andtwo of the side Wall sections being cut out to form an opening to give access to the chamber of the oven and a being coupled by aA lower i cross frame Var-pV ranged at right angles to the first named cross V frame and vertically spaced annular rings joining all of said frame members, any oven `body supported in the'frame between and by the top and bottom cross framesl andi said rings, a vertical shaft'supported in the top `and bottom cross frames centrally thereof and extending through the oven body, Ya ro-i tatable table coupledwith said shaft Within the oven body, said shaft projecting through the top and bottom cross frames, means involving an electric motor supported inconnection with the top cross frame for rotating said shaft and table, means inthe bottom cross frame for vertically adjusting the shaft and table in the oven body, saidtable dividing the oven chamber into top and bottom compartments, and a beveled ring arranged arcundfand adjacent the periphery of the table. .c Y f fr In testimony thatv I claim the foregoing as my invention I have signed my nainethis 20th day of Octoberl93l. JOSEPH NEEDHAM.

peel door controlling said openingand four verticalframe members being employed, lsaid frame members being arranged at alternate Vintersections of said side Wall sections, andy vertical finishing strips arranged upon and covering the' intermediate intersections of the side Wall sections.

8. Acknock down oven of the class de-A scribedk comprising a frame consistingof a plurality of vertical frame memberstvvo opposed frame members being coupled by one' transverse top fi'ame, `the other tWo vertical frames being coupled by aloWer crcss'frame arranged jat right angles to the first-named cross frame and vertically spaced annular ringsjoining all of said lframe members, an Y oven body supported in the framebetween and bythe top and bottom cross frames and said rings, a vertical shaft supported in the top and bottom cross frames centrally tliereof and; extending through the oven body, a rotatable table coupled With said shaft Within the oven body, saidshaft projecting through the top and bottom cross frames, means iii-vk p v volvng an electric motor supported in `connection with the top cross frame for rotating said shaft and table, and means in the bottom cross frame forvertically adjusting the shaft and table in the oven body.v A v 9. A knock down oven of the class described comprising a frame consisting of a plurality of vertical frame members, tWo opposed frame members being coupled by one transverse top frame, the other tWo vertical frames 

